Pot type oil burner



June 1, 1948. 5, LONG r 2,442,465

POT TYPE OIL BURNER Filed Oct. 29, 1946 2 Sheets-Sheet 1 HEN/2v 5'. Zo/vG 'JoH/v F/E1.0$ 7 17 i INV roRS.

ATTORNEY June I, 1948. H. 5. LONG EI'AL POT TYPE OIL BURNER 2 Sheets-Sheet 2 Filed Oct. 29, 1946 HENRY 5 LONG JOHN 1-? FIELDS /NVENTORS.

with portions broken Patented June 1, 1948 UNITED STATES PATENT OFFICE POT TYPE OIL BURNER Henry S. Long, Gastonla, and John P. Fields,

Fayetteville, N. C.

Application October 29, 1946, Serial No. 708,480

3 Claims.

This invention relates to an oil burner, and more especially to a pot type oil burner especially adaptable for use in tobacco barns for curing tobacco therein.

We are aware that heretofore various types of oil burners have been devised but we are of the opinion that our present oil burner is more economical and has less wearing parts, and is capable of finer adjustment as to the amount of fuel consumed than other oil burners now in use.

It is an object of our invention to provide an oil burner of the pot burner type, having a central annular wall forming a well into which'the fuel is fed, and having a cone-shaped plug substantially closing said well but leaving an oil space at the bottom thereof and said wall having a transverse bore near its base and being surrounded with a pan-like member, whereby the initial fuel passing into the burner will flow out through the base onto the pan-like member and heat the walls of the well and heat the oil therein and vaporize it, and the adjustable plug disposed in the well will allow the vaporized fuel to pass out through the space between the plug and the walls of the well to be consumed as a vapor and not as a liquid fuel, thus greatly, if not entirely, eliminating the accumulation of carbon due to imperfect combustion.

It is another object of our invention to provide an oil burner having a disk-like pan-shaped member provided with a centrally disposed well and having a plug disposed in said well and having a fuel feed pipe connected to the bottom of said well and threadably engaging said plug, whereby the fuel will be allowed to flow intothe well and by relative movement between the threaded fuel pipe extending into the well and the plug, the orifice or space appearing between the plug and the walls of the well can be regulated to thereby regulate the amount of vapor and the quality of the vapor passing outwardly of the well between the outer walls of the plug and the inner walls of the well.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings in which Figure 1 is a top plan view of the apparatus away;

Figure 2 is a vertical sectional view taken along the line 2-2 in Figure 1;

Figure 3 is a top plan view of the central portion of the apparatus showing theplug removed and showing a modified form or the invention;

Figure 4 is a vertical sectional view similar to 2 Figure 2 but being taken along the liiie 4-4 in Figure 3, and showing the plug in raised position.

Referring more specifically to the drawing, Ill indicates broadly a circular member having-a circular rim ll provided with a peripheral groove I2 into which a flue, not shown, may be fitted if desired. The rim ll surrounds an annular well l3 which has an annular wall l4 centrally-located therein, into which a conical plug I5 is adapted to have up-and-down movement and adapted to be fitted to provide a small vapor space between the inner wall of the annular wall l4 and the outer surface of the conical plug IS.

The member I'O is supported by a plurality of legs ll of any desired height for supporting it in spaced relation to the ground in a tobacco barn or while disposed on any other suitable support. The annular wall I defines a circular well l8 which has a, threaded hole in its bottom por tion in which is mounted a threaded pipe 20 having a cross bore 2| therein to permit liquid fuel to flow into the lower portion of the well l8. The annularwall I4 has a bore 22 extending from the lower portion of the well l8 to the exterior of the annular wall I, near a junction point with the main body portion of disk Ill.

The pipe 20 is adapted to penetrate a threaded bore 23 disposed in the lower end of the conical plug l5 and by relative movement between the plug 15 and the threaded pipe 20, the amount of vapor space left between the sloping shouldered portion 24 of the well I 8 and the exterior of the conical plug l5 may be regulated, thereby regulating the amount and quality of vapor escaping upwardly to the upper rim of the annular wall l4 to be consumed by a flame. The pipe 20, when adjusted in position, can be locked in position by means of a lock nut 26 and, if desired, a suitable gasket or washer 21 may be disposed between the lock nut 26 and the lower surface of the member I0. I

The lower end of the pipe 20 has integral therewith an enlarged nut portion 28 which is adapted to be engaged by a wrench for turning the pipe 20 relative to the member Ill. The lower end of the member 20 and its nut portion is threaded and is adapted to have secured therein a suitable elbow 30 to which is connected by-means of a jam nut 3 I, a fuel pipe 32 leading to a source of liquid fuel, such as fuel oil, kerosene and the like.

In Figures 3 and 4 a slightly modified form of the invention is shown in which many of the parts are identical to that shown in Figures 1 and 2 and like reference characters will apply. the main difference being that the'pipe ll is threaded internally and the elbow 80 has an elongated vertical portion 35 which is vertically mounted in the lower end of the member 20. Also mounted on the upstanding portion 35 of the elbow I0 is a lock nut 36 and by this arrangement it is possible to loosen the lock nut 18 and rotate the pipe 20 without having to engage the conical member Ill to prevent its rotation also. In this form of invention also the sloping wall portion 24 has a groove 40 therein, into which is adapted to lit a key M on the exterior of the conical plug 15 so as to prevent movement of the conical plug 18 when the pipe 20 is turned by engaging the nut portion 28. In this form of invention the relative height of the conical plug l5 relativetothe sloping face 24 can be regulated without gaining access to the interior of the burner. V g n As has already been stated, oil flows out through-bore 22 when the burner is initiallyfired. After sufficient heat has been generated to create oil vapors in the well i8, these vapors pafiS'out through the space between the inner surface of well 18 and the outer surface of conical plug it and thus air will flow inwardly through bore 22 to aid combustion.

In the drawings and specification there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being defined in the claims.

We claim:

1. An oil burner comprising a circular base member having an annular grooved portion in its upper suriaee, an annular wall rising from the central upper portion of the base member and providing a conical well having upwardly and outwardly sloping side walls, a cone-shaped member adapted to fit into the conical well and to fit against the outwardly sloping inner surface of said wall, the lower end of the cone-shaped memher having a threaded bore therein, a fuel pipe extending upwardly through the lower central portion of the base member and threadably engaging said bore in the cone-shaped member, said fuel pipe having a cross bore allowing fuel to flow into the lower portion of the well defined by the centrally disposed annular wall, said annular wall having a bore communicating with a lower portion of the well and with a lower portion of the annular groove surrounding the well to allow fuel to flow into the annular groove for initial firing of the burner, relative movement between the cone-shaped member and the fuel supply pipe serving to regulate the space between the inner wall of the conical well and the cone-shaped member to thereby regulate the amount and quality of oil vapor passing upwardly out of the well.

2. An oil burner comprising a circular base member having a broad annular groove in its upper'surface and having an annular wall centrally 4 disposed therein and rising upwardly from the base member, and defining a conical well, said annular wall having its interior surface of greater dimension at the top than at the bottom and thus providing a sloping inwardly converging inner surface on the inside of said annular wall, a conically shaped plug adapted to fit into the conical well, a threaded fuel supply pipe penetrating the lower portion of the base member and communicating with the interior of the well and projec'ting up into the conical well, the lower end of the conically shaped plug having a threaded bore therein adapted to receive, the upper end of the threaded pipe penetrating the base member, the threaded pipe having a cross bore therein for feeding liquid fuel to the lower portion of the well, the annular wall having a bore extending from the bottom of the conical well and opening into said annular groove to allow liquid fuel to flow I into the annular groove for initial firing of the burner, relative movement between the conically shaped plug and the threaded pipe penetrating the base member serving to regulate the space between the exterior of the conically shaped plug and the inner sloping wall of the well.

3. An oil burner comprising a, base member having an upwardly projecting annular rim portion and having a centrally disposed annular wall forming a conical well, a cone-shaped plug mounted in the conical well and having a threaded bore in its lower portion, a fuel supply pipe threadably mounted in the base member and extending up into said well and being threadably engaged by the bore in the lower end of the coneshaped plug, the threaded pipe being adapted to supply liquid fuel to the bottom of said conical well, the threaded pipe having 'a cross bore through which the fuel flows into the bottom of the well. the annular wall having a, bore therethrough communicating with the upper surface of the base member inwardly of said rim portion and with the lower portion of the well through which fuel may flow for initial firing of the burner, relative movement between the conesha ed plug and the threaded pipe serving to regulate the amount of space occurring between the cone-shaped plug and the inner wall of the well to regulate the amount and quality of vaporized fuel passing upwardly out of the well.

HENR

Y S. LONG. JOHN P. FIELDS.

REFERENCES CITED The following references are of record in the 

